Publications by authors named "Dae H Yoon"

Background: Dementia is associated with older adults; however, it can also affect younger individuals, known as young-onset dementia (YOD), when diagnosed before the age of 65 years. We aimed to conduct a retrospective cohort study involving middle-aged women to investigate the association between premorbid depression and YOD development.

Methods: We included 1.

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Highly efficient water splitting electrocatalyst for producing hydrogen as a renewable energy source offers potential to achieve net-zero. However, it has significant challenges in using transition metal electrocatalysts as alternatives to noble metals due to their low efficiency and durability, furthermore, the reliance on electricity generation for electrocatalysts from fossil fuels leads to unavoidable carbon emissions. Here, a highly efficient self-powered water splitting system integrated is designed with triboelectric nanogenerator (TENG) and NiFeN@FeN catalyst with improved catalytic activity and durability.

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The tunable properties of 2D transition-metal dichalcogenide (TMDs) materials are extensively investigated for high-performance and wavelength-tunable optoelectronic applications. However, the precise modification of large-scale systems for practical optoelectronic applications remains a challenge. In this study, a wafer-scale atomic assembly process to produce 2D multinary (binary, ternary, and quaternary) TMDs for broadband photodetection is demonstrated.

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Article Synopsis
  • A genome-wide association study (GWAS) was conducted on a Korean population to identify genetic links to depression, using two large participant cohorts totaling over 8,000 individuals.
  • The study found a significant association between a specific genetic variant (rs6945590) and depressive symptoms, supported by additional analyses in other cohorts.
  • A decrease in the expression of the TBXAS1 gene, linked to the identified genetic variant, was correlated with an increased risk of depressive symptoms, indicating a potential causal relationship.
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Combining an electrochemically stable material onto the surface of a catalyst can improve the durability of a transition metal catalyst, and enable the catalyst to operate stably at high current density. Herein, the contribution of the N-doped carbon shell (NCS) to the electrochemical properties is evaluated by comparing the characteristics of the NiFe@NCS catalyst with the N-doped carbon shell, and the NiFe catalyst. The synthesized NiFe@NCS catalyst has a distinct overpotential difference from the NiFe catalyst (η = 468.

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Background: Alzheimer's disease (AD) is the most common form of dementia, which makes the lives of patients and their families difficult for various reasons. Therefore, early detection of AD is crucial to alleviating the symptoms through medication and treatment.

Objective: Given that AD strongly induces language disorders, this study aims to detect AD rapidly by analyzing the language characteristics.

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Purpose: Artificial intelligence (AI)-based image analysis tools to quantify the brain have become commercialized. However, insufficient data for learning and scanner specificity is a limitation for achieving high quality. In the present study, the performance of personalized brain segmentation software when applied to multicenter data using an AI model trained on data from a single institution was improved.

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Objective: The aims of our study were to identify distinct trajectories of cognitive function using the group-based trajectory model. We also investigate which demographic factors act as risk factors for cognitive decline in each group.

Methods: The data from the Seoul National University Hospital Healthcare System Gangnam Center, from 2005 to 2019.

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Silver nanoparticles (Ag-NPs) are most effective against pathogens and have widely been studied as antibacterial agents in commodity clothing, medical textile, and other hygiene products. However, prolonged utilization of silver and rapid mutation in bacterium stains has made them resistant to conventional silver agents. On the other hand, strict compliance against excessive utilization of toxic reagents and the current sustainability drive is forcing material synthesis toward green routes with extended functionality.

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With advancement of technology, requirements for light-emitting devices are increasing. Various types of packaging technologies have been suggested to improve the performance of light-emitting diode (LED). Among them, phosphor in glass (PiG) is attracting attention due to its manufactural facility and easily tunable characteristics.

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This study investigates the characteristics of a ceramic phosphor (CP) for the converter of a high-power laser diode-based automobile headlamp synthesized by high-frequency induction heated press (HFP) sintering. The CP prepared by an HFP method exhibits remarkable optical properties that are comparable to spark plasma sintering. The effects of post-treatment process for controlling residual pores, as well as sintering temperature, sintering pressure and heating rate for optimization of the HFP sintering method, were studied.

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Article Synopsis
  • - The study focused on creating ceramic phosphors using nano-sized LuAlO:Ce particles made through a sol-gel-combustion method, which resulted in particles around 200 nm in size.
  • - These nano phosphors were then formed into ceramic phosphors using vacuum sintering, with added alumina powder to enhance their properties.
  • - The final ceramic phosphors were tested in a high-power laser beam projector to evaluate their optical performance, showing potential for substantial influence on the laser-driven lighting industry.
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Colorectal cancer (CRC) is one of the diseases with the highest rates of prevalence and mortality despite therapeutic methods in the world. In particular, there are not enough methods to treat metastasis of CRC cells to distant organs. Linne () is a popular medicinal plant used by humans to treat many diseases.

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Current hydrogel strain sensors have met assorted essential requirements of wearing comfort, mechanical toughness, and strain sensitivity. However, an increment in the toughness of a hydrogel usually leads to an increase in elastic moduli that could be unfavorable for wearing comfort. In addition, traits of biofriendly and sustainability require synthesis of the hydrogels from natural polymer-based networks.

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Background: Despite the rising 5-year survival rate of colorectal cancer (CRC) patients, the survival rate decreases as the stage progress, and a low survival rate is highly associated with metastasis.

Purpose: The purpose of our study is to investigate the effect of dehydroevodiamine (DHE) on the lung metastasis of CRC and the proliferation of CRC cells.

Study Design: Cell death was confirmed after DHE treatment on several CRC cell lines.

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Abstract: Cross-linkers have great importance in textile due to the widespread utilization of cellulosic fibers for clothing. Unfortunately, the acute toxicity of formaldehyde-based resins and the poor performance of non-formaldehyde resins still keep the research door open for scientists in this area. Herein, we demonstrated copper nanoparticles induced trimesic acid grafted cellulose as a sustainable solution for multifunctional easy-care clothing.

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Article Synopsis
  • A study was conducted in South Korea to evaluate how common it is for patients to stop taking antiplatelet medications after experiencing an ischemic stroke, using national health data from 2003 to 2010.
  • Out of 4,621 patients analyzed, 35.5% discontinued their antiplatelet treatment within 12 months, and this increased to 58.5% within 24 months.
  • Key factors influencing premature discontinuation included starting with aspirin alone, having a higher comorbidity index, living in rural areas, taking fewer medications, lower income, and being older than 70 years.
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Article Synopsis
  • - Colorectal cancer (CRC) is a leading cause of cancer deaths globally, and this study explored the effects of gallotannin (GT), a natural compound, on metastatic CRC cells.
  • - GT was found to significantly reduce the viability of various metastatic CRC cell lines through mechanisms like inducing cell death, disrupting the cell cycle, and promoting autophagy.
  • - The compound also inhibited cancer cell migration and invasion by affecting crucial signaling pathways and lowering the levels of proteins involved in metastasis, suggesting it could be a potential therapeutic agent against metastatic CRC.
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Organic polymer-based dielectrics with intrinsic mechanical flexibility and good processability are excellent candidates for the dielectric layer of flexible electronics. These polymer films can become even more rigid and electrically robust when modified through cross-linking processes. Moreover, the composites formed by dispersing nanoscale inorganic fillers in a polymer matrix can exhibit further improved polarization property.

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Background: Cachexia induced by cancer is a systemic wasting syndrome and it accompanies continuous body weight loss with the exhaustion of skeletal muscle and adipose tissue. Cancer cachexia is not only a problem in itself, but it also reduces the effectiveness of treatments and deteriorates quality of life. However, effective treatments have not been found yet.

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Despite the fact that stability is a critical issue affecting halide perovskite after the materials have been developed, these materials continue to be studied due to their outstanding optoelectronic characteristics such as narrow emission band width, high PLQY. Many methods are suggested and improved, but the limitations for the display and lighting applications are still remaining. Here, we propose the fabrication of stable cesium lead tri-halide (CsPbX₃; X= Cl, Br, I) perovskite films using photocurable polyurethane material, norland optical adhesive 63 (NOA 63), to generate white LEDs by placing films on the InGaN 450 nm blue chip.

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Sensory adaptation is an essential part of biological neural systems for sustaining human life. Using the light-induced halide phase segregation of CsPb(BrI) perovskite, we introduce neuromorphic phototransistors that emulate human sensory adaptation. The phototransistor based on a hybrid structure of perovskite and transition-metal dichalcogenide (TMD) emulates the sensory adaptation in response to a continuous light stimulus, similar to the neural system.

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Our objective in this study was to investigate a sensor for volatile organic compounds based on a graphite (G)/polypropylene glycol (PPG) hybrid composite (HC) for sensing hybrid elements. The G/PPG HC sensor films for organic-matter detection were successfully fabricated on polyethylene terephthalate (PET) film with a simple blade-coating method. The sensing paste based on G/PPG (1:2) HC showed good dispersibility and stability.

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Pancreatic cancer (PC) is one of the most severe cancers, and its incidence and mortality rates have steadily increased in the past decade. In this study, we demonstrate the effect of Nakai extract on pancreatic ductal adenocarcinoma cells. We prepared Nakai ethanol extract (AGE) using roots of Nakai and detected its active compound decursin from AGE by ultra-performance liquid chromatography analysis.

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